N120 Extension Ring 70 with Focus Knob.
An N120 extension ring with knob for zoom lens focus control (require optional focus gear).
Compatible lenses:
- Canon EF 16-35mm f/2.8L II USM
- Nikon AF-S NIKKOR 16-35mm f/4G ED VR
This extension ring is not compatible with focus gear #19551 C1124-F and #19555 C1635III-F
